One vertex per element, one color per generator, with an edge from x to x·s.
(2,6)(7,8)(9,10)(11,15)(12,13)(14,16)(17,18,23,25)(19,28,20,24)(21,22,27,26)(29,32,31,30)(1,2,5,6)(3,7,4,8)(17,19,23,20)(18,24,25,28)(21,29,27,31)(22,30,26,32)(10,13)(14,15)(18,25)(19,20)(22,26)(29,31) involution — undirected(1,3,5,4)(2,7,6,8)(9,10)(11,14)(12,13)(15,16)(17,20,23,19)(18,24,25,28)(21,29,27,31)(22,32,26,30)(9,11)(10,14)(12,16)(13,15)(17,21,23,27)(18,26,25,22)(19,29,20,31)(24,32,28,30)(1,4,5,3)(2,8,6,7)(17,22,23,26)(18,27,25,21)(19,30,20,32)(24,31,28,29)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.